Its not on the Linksys UK website yet but I am sure it will be soon enough.
Click here for more information
In the 5.0GHz spectrum it gives you 3 spatial streams an what that means is 450Mbps, you can also channel get 300Mbps in the 2.4GHz spectrum.
Here are the highlights
•Simultaneous dual-band for high performance wireless entertainment
•Maximum speed (300 + 450 Mbps) for ultra-fast wireless transfer rates
•Gigabit Ethernet (10/100/1000 Mbps) ports for 10x faster wired speeds
•USB Storage Port for centralized file sharing with built-in UPnP AV media server
•Full 3x3 MIMO antenna array for maximum range and reliability
Wireless-N Technology
Built with leading 802.11n wireless technology. The Linksys E4200 offers maximum speed and range to create an ultra-powerful network designed for home theater performance. Connect your computers, Internet-ready TVs, game consoles, and other Wi-Fi devices at transfer rates up to 300 + 450 Mbps for an unrivaled experience.
The Power of Dual-Band
Double your network bandwidth with simultaneous dual-band N (2.4 and 5 GHz) designed to avoid interference and optimize throughput for smoother and faster HD video streaming, file transfers, and wireless gaming.
SpeedBoost
High-power amplifiers increase signal strength across greater distances for maximum wireless coverage and in-home mobility.
State-of-the-Art Security
Keep Wi-Fi freeloaders and Internet threats at bay with WPA/WPA2 encryption and SPI firewall to help keep your network protected.
Benefits of Gigabit
Use the four Gigabit Ethernet (10/100/1000) ports for quick file sharing, 10x faster than standard Ethernet, between other Gigabit-enabled devices like computers, hard drives, and servers.
Built-in USBPort and UPnP Media Server
The USB Storage Port lets you add an external USB drive to your network and share files at home or over the Internet. Plus, a built-in UPnP AV Media Server for seamless streaming of your video and media files to an Xbox 360, PS3, or other UPnP compatible device.
Home Theater Ready
Bring the ultimate entertainment experience to your home by connecting computers, Internet-ready TVs, game consoles, media players and more to your wireless network and the Internet. Simultaneous dual-band N and QoS traffic prioritization technology delivers maximum speed and performance so you can enjoy fast downloads, smooth video and music streaming, and lag free gaming and VoIP.
Quick to Install
Cisco Connect software helps you set up in three easy steps and your secure wireless network is ready to go.
Easy to Manage
Cisco Connect software helps you customize your settings, and quickly add multiple devices to your network:
Create a separate, secure, password protected network for guests
Limit access time and websites with Parental Controls
Easily access advanced network settings
